[C:1]([CH:3]=[CH:4][C:5]1[CH:6]=[C:7]([CH:11]2[O:15][CH2:14][CH2:13][O:12]2)[CH:8]=[CH:9][CH:10]=1)#[N:2]>C(OCC)(=O)C.[C].[Pd]>[C:1]([CH2:3][CH2:4][C:5]1[CH:6]=[C:7]([CH:11]2[O:12][CH2:13][CH2:14][O:15]2)[CH:8]=[CH:9][CH:10]=1)#[N:2]To a solution of 4.48 g of a cis-trans isomer mixture of 2-[3-(2-cyanoethenyl)phenyl]-[1,3]dioxolane in 100 ml of ethyl acetate was added 0.60 g of 5% palladium carbon to perform hydrogenation. The catalyst was filtered by filtration with Celite, and the filtrate was concentrated under reduced pressure to obtain 3.52 g of 2-[3-(2-cyanoethyl)phenyl]-[1,3]dioxolane.
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